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07-25-2021, 03:03 PM
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#1
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Senior Member
Join Date: Jul 2014
Location: Moreno Valley, Ca
Posts: 113
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What is this switch.
 There are 2 of these- one in the bedroom and one in the kitchen area. Since they have wires attached, they must do something…..
Second question is whether anyone here has replaced these particular light switches with one the can dim the lights. I can’t seem to get the plastic outer ring off to access what I suppose are mounting screws and I don’t want to break it. Thanks in advance! 
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2021 Keystone Cougar 368MBI
2011 Ford F-450 Super Duty Diesel
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07-25-2021, 03:06 PM
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#2
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,318
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Those are remote “thermistors” they report the temp to the thermostat.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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07-25-2021, 03:27 PM
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#3
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,819
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Quote:
Originally Posted by chuckster57
Those are remote “thermistors” they report the temp to the thermostat.
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Chuck. Not to hijack the thread but what’s the best way to take the switch off the wall with the light under the thermister? Does the outside bezel pop off with a screwdriver or do you pop off the switch from the bezel? I can’t stand the lighted switches and want to extinguish that light once and for all! ….it’s too bright
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2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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07-25-2021, 03:31 PM
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#4
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Member
Join Date: Dec 2020
Location: Space Coast
Posts: 37
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black nail polish ? why waste time with taking it off and replacing it
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LnS
2019 F150XLT
2021 Cougar 25RDS TT
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07-25-2021, 03:36 PM
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#5
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,318
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Quote:
Originally Posted by jasin1
Chuck. Not to hijack the thread but what’s the best way to take the switch off the wall with the light under the thermister? Does the outside bezel pop off with a screwdriver or do you pop off the switch from the bezel? I can’t stand the lighted switches and want to extinguish that light once and for all! ….it’s too bright
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Bezel pops off.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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07-25-2021, 04:16 PM
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#6
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,819
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Quote:
Originally Posted by LnS
black nail polish ? why waste time with taking it off and replacing it
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The light is behind the switch
__________________
2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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07-25-2021, 04:16 PM
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#7
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,819
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Quote:
Originally Posted by chuckster57
Bezel pops off.
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Thanks! I appreciate
__________________
2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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07-25-2021, 05:14 PM
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#8
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Senior Member
Join Date: Feb 2019
Location: Wickenburg
Posts: 3,304
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I'm buffaloed. Why would a thermistor have a switch on it? (Much less a light.)
__________________
2019 Cougar 26RBSWE
2019 Ford F-250
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07-25-2021, 05:21 PM
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#9
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,819
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Quote:
Originally Posted by LHaven
I'm buffaloed. Why would a thermistor have a switch on it? (Much less a light.)
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The switch just happens to be mounted just below the thermistor..it’s an illuminated switch
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2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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07-25-2021, 05:28 PM
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#10
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Senior Member
Join Date: Feb 2019
Location: Wickenburg
Posts: 3,304
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Ah, so then the OP's original question "what does this switch turn on" is still a mystery.
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2019 Cougar 26RBSWE
2019 Ford F-250
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07-25-2021, 05:36 PM
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#11
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,819
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Quote:
Originally Posted by LHaven
Ah, so then the OP's original question "what does this switch turn on" is still a mystery.
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I think the op used the term “switch” for the thermistor ..it looks like he was trying to replace the light switch with dimmer switches or at least investigate that possibility and he removed the thermistor possibly to better gain access to the light switch and questioned its purpose..that’s what I got from it
__________________
2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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07-25-2021, 05:48 PM
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#12
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Senior Member
Join Date: Jul 2014
Location: Moreno Valley, Ca
Posts: 113
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Yes, I want to change out the illuminated switch for one that is a dimmer. The bezel is difficult to remove, and I don’t want to break it.
Thanks for the thermister answer. I had no idea that these even existed…..
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2021 Keystone Cougar 368MBI
2011 Ford F-450 Super Duty Diesel
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07-25-2021, 06:07 PM
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#13
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,318
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Your welcome. The bezel should pop off if you use a thin blade at the top or bottom. Are you looking to dim LED lights?
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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07-25-2021, 07:12 PM
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#14
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Senior Member
Join Date: Jul 2014
Location: Moreno Valley, Ca
Posts: 113
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Yes I am...
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07-25-2021, 10:03 PM
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#15
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Senior Member
Join Date: Feb 2019
Location: Wickenburg
Posts: 3,304
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Ah, I see now. I was misinterpreting the picture. I thought it was all one plastic unit, taken off the wall and hanging from the wire.
__________________
2019 Cougar 26RBSWE
2019 Ford F-250
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07-29-2021, 08:42 AM
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#16
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Senior Member
Join Date: Jul 2017
Location: Romeo
Posts: 142
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could the switch enable or disable the thermistor ??
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2018 Cougar 359MBI
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07-29-2021, 08:52 AM
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#17
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Site Team
Join Date: Oct 2011
Location: Joppa, MD
Posts: 11,741
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Quote:
Originally Posted by Mic
could the switch enable or disable the thermistor ??
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No, that would defeat its purpose.
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Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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08-01-2021, 07:40 AM
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#18
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Member
Join Date: Aug 2018
Location: Slippery Rock
Posts: 49
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Two separate questions. What is this? (Hanging from wires,) and how to remove the cover of switch below to install a dimmer in its place.
Woohoo! Who's on first!? LOL 😂
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08-01-2021, 07:42 AM
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#19
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Junior Member
Join Date: Jul 2019
Location: Hudson
Posts: 13
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I have never heard of a "Thermostir" before. If I let my Cougar get too hot, like 95, I can't start the A/C. Everything I could find they say something won't connect when it is too hot. They also in those articles that the A/C company is supposed to send or did send out a fix. Anyone know about that. I hope I am not hijacking this post.
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08-01-2021, 08:05 AM
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#20
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,979
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Quote:
Originally Posted by rakearns1
I have never heard of a "Thermostir" before. If I let my Cougar get too hot, like 95, I can't start the A/C. Everything I could find they say something won't connect when it is too hot. They also in those articles that the A/C company is supposed to send or did send out a fix. Anyone know about that. I hope I am not hijacking this post.
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There is a "known issue" with the In-Command system interface with some air conditioner/furnace operations. Below 40F or above 90F the In-Command system "locks out HVAC controls".
The easiest way to fix it in an emergency situation (at a campground when it's hot and you don't have ready access to the dealership and warranty repairs) is to put a couple of ice cubes in a ziplock bag, wrap in a hand towel and hold that over the thermistor sensor for a minute or two. That will lower the temperature being sensed and "unlock the In-Command system" so you can operate the HVAC system.
You can do the same with a hair dryer in the winter if the thermistor sensor is below the "lower operating lockout temperature"....
Ideally, your dealership should install the replacement HVAC control box that's located in the air conditioner overhead unit.
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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